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Regular Expression
@"
(?<![\(\[`])big(?!.*[\)\]`])
"
gm
Input 1
1
New
Should Match: I like `xx` big `xx` cakes I like big cakes I like `big cakes I like big` cakes I like xx big xx cakes I like ` xx big xx cakes I like xx big xx` cakes I like `xx` big `xx` cakes I like big cakes I like [big cakes I like big] cakes I like xx big xx cakes I like [ xx big xx cakes I like xx big xx] cakes I like [xx] big [xx] cakes I like big cakes I like (big cakes I like big) cakes I like xx big xx cakes I like ( xx big xx cakes I like xx big xx) cakes I like (xx) big (xx) cakes I like (xx(test(big test big ( big ))) big xx) big (xx(test(big test big ( big ))) big xx) cakes ^^^ Should not Match: I like (big) cakes I like (xx big xx) cakes I like [big] cakes I like [xx big xx] cakes I like `big` cakes I like `xx big xx` cakes I like (xx(test(big test big ( big ))) big xx) cakes